A combined analysis of SLAC experiments on deep inelastic e-p and e-d scattering

Conference · Tue Aug 01 00:00:00 EDT 1989

OSTI ID:7083950

Whitlow, L W ^[1]; Bodek, A; deBarbaro, P; Dasu, S; Harada, H; Krasny, M W; Lang, K; Riordan, E M ^[2]; Rock, S; Arnold, R; Benton, D; Bosted, P; Button-Shafer, J; deChambrier, G; Clogher, L; Lung, A; Szalata, Z M ^[3]; Alster, J ^[4]; Debebe, B; Hicks, R ^[5]

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1. Stanford Univ., CA (United States)
2. Rochester Univ., NY (United States)
3. American Univ., Washington, DC (United States)
4. Tel Aviv Univ. (Israel)
5. Massach

We report recent work on the extraction of R = {sigma}{sub L}/{sigma}{sub T} and the structure function F{sub 2} over a large kinematic range, which is based on a reanalysis of deep inelastic {var epsilon} {minus} p and {var epsilon} {minus} d scattering cross sections measured at SLAC between 1970 and 1985. All these data were corrected for radiative effects using improved versions of external and internal radiative correction procedures. The data from seven individual experiments were normalized to those from the recent high-precision SLAC experiment E140. We find that R{sub p} = R{sub d}, as expected in QCD. The value of R is higher than predicted by QCD even when target-mass effects are included. This difference indicates that additional dynamical higher-twist effects may be present. The structure functions F{sub 2}p and F{sub 2}d were also extracted from the full data sets of normalized cross sections using an empirical fit to R. These structure functions were then compared with data from the CERN muon scattering experiments BCDMS and EMC. We find that our data are consistent with the EMC data, if the latter are multiplied by a normalization factor of 1.07. No single, uniform normalization factor can be applied to the BCDMS data that will bring them into agreement with the SLAC data in the region of overlap.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 7083950
• Report Number(s): SLAC-PUB-5100; UR-1119; ER-13065-586; CONF-890903-1; ON: DE92018151
• Resource Relation: Conference: International europhysics conference on high-energy physics, Madrid (Spain), 6-14 Sep 1989
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-DEUTERON INTERACTIONS
DEEP INELASTIC SCATTERING
ELECTRON-PROTON INTERACTIONS
CROSS SECTIONS
QUANTUM CHROMODYNAMICS
STRUCTURE FUNCTIONS
ELECTRON-NUCLEON INTERACTIONS
FIELD THEORIES
FUNCTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
QUANTUM FIELD THEORY
SCATTERING
662330* - Photon & Charged-Lepton Interactions with Hadrons- (1992)